Improvement in reversible hinges



PATENTED MAY 9, 1871.

.F. W. MARSTON.

REVERSIBLE HINGE.

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diniidl 5%itit5 FRANK W. MARSTQN, QB PHILADELPHIA, PENNSYLVANIA.

. Lends Patent. No. 114,579, dated May 9, 1871'.

IMPROVEMENT IN REVERSIBLE HINGES.

The Schedule referred to in these Letters Patent and making part of the Janie.

To all whom it may concern: 7

Be it known that I, FRANK W. MARsTon, o the city and county of Philadelphia, in the State of Pennsylvania, have invented a new and useful Improvement in Reversible Hinges; and I' do hereby declare the following to be a 41in, clear, and exact description thereof, which will enable others skilled in the art to which it appertains to make and use my invention, reference being bad to the accompanying drawing which forms a part of this specificatiomaud in which.

Figure '1 is a perspective view of my invention;

Figure 2, a horizontal section through the closed hinge, indicating by dotted lines its movement when opened in either direction; and

Figures and 4, parts of a'similar section, showing modifications of arrangement and construction.

The same parts are denoteddiy the same letters in all the figures.

This invention is a revcrsihlehinge, consisting of two leaves connecteu only at their sides, and by means substantially as hereinafter described, so thatthe leaves cannot be detached from each other in any position. v

A in the drawing represents that leaf of the hinge which is secured to the. jamb, and j B the leaf which is secured to-the door.

Both leaves have shoulders O 0 cast on each side 1 to lit the dooror jamb.

The leaf A is also constructed with studs D D, which, when the door is closed, fit into corresponding slots E E.

The edges which would be formed on each side by the intersection of the face with the shoulders are beveled off, as shown, at F, and on the beveled surcular'segment not less than a semicircle, are driven' through the cylindrical bosses of the leaf A so that each pin is firmly secured to all the bosses on'-its side of the leaf A, and is in the line of their common axle. V

' he bosses G Gon the leaf B are slotted, assholwn in section at a b c d, fig. 2, the interior boundary of the slot 1) 0 being a circular arc concentric with the section of the .boss, while the lines ab c d, which form the remaining boundaries of the open slot, are circular arcs described from the center e of the boss G oirthe other side of the leaf B. I

The distance between the ans a b and c d (the difference of he r radiuscs) is just enough to admit the pin I, the radius of whose section is nearly'equal to the radius of b 0, into the slot when its flat side is parallel or nearly so to a b and c d, and the pin is so adjusted that, when the hinge is closed and the convex surface of the pin in contact with the interior surface of 'the'slot, (whose section is b 0,) the flat side of the .pin shall be just-within the prolongation of the boundary or-wall of the slot whose section is c d.

The slot f g It '6 is in like manner bounded by the arc g h, whose center is e, and by the arcs f g ht,

described about the center k of the boss G; and the distance between these arcs .is determined with relat-ion .to the pin'I', and the pin adjusted as already explained.

The operation of these devices is as follows: The door being closed, (in 'which position it' is supported against sagging 'by the studs D fitting into 'slot-s E,) it may be opened in either direction, but cannot be detached from the jamb.

A strain on the leaf B, at right angles to its face,

(in the direction of the arrow w w. fig. 2,) would not nemcheicher the'bossesG G or G G mm their re 'spective pins I and I, as it would only draw and bind the outer walls 0 (land f g of the slots against the adjacent edges of the pins. If, however, the force. be oblique to the face of the leaf, (as in the direction of the arrow y z,) the wall 0 llwill slide easily on the flat side of the pin I and the leaf will revolve about the center e..

As the door opens the concave surface g h of the slot turns on the convex surface of the pin 1', the boss G locking more firmly ,around the pin as the concave surface passes the edge of the pin, as shown in dotted lines in fig. 2.

The reverse operation takes place when the door is opened in the opposite direction, as shown in dotted lines in fig. 2, and in perspective in fig. 1.

The pins may also be adjusted with their flat sides in the opposite positiomto that shown in figs. 1 and 2. Fig. 3 represents this modification.

The slots in this case are described with relation to i the pins in the manner already explained.

' Instead of forming the slots as heretofore described,

the inner projecting iip ofthe boss may be-cut away, ,as shown in fig. 4, so as to save metal.

What I claim as my invention, and desire to secure by Letters Patent of the United States, is-

1. A reversible hinge, consisting. of two leaves, connected only at their sides, and by means substantially as described, so that the leaves cannot be detached from each other in any position.

2. The combination, operating as described, of the bosses G G with the pins I 1, whose transverse section is a circular segmeutjnot less than a semicircle.

V FRANK W. MARSTON. Witnesses:

- WMLRKWBTGHT, Tnos. A. Boner. 

